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最佳答案：Durem 311 is a highly effective hydrophobic agent for aqueous paints,which can c
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最佳答案：Through field tricolor ink density measurement and calculation,the actual analys
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最佳答案：说明：已很简洁、准确.配方B为亲水性,可溶解10%以下的水样,合并为一句：亲水性的配方B可……还又个办法是把水样简写成wat.samp.甚至WS,再在表格下面注
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最佳答案：Dear Sir,I’m glad that you are interested in our products.We have begun the rese
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最佳答案：The silvery roller pens are 120pcs per box and we only sell them in box.I am sor
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最佳答案：双酚A型环氧树脂 bisphenols A epoxy resin环氧值 epoxide equivalent纳米碳酸钙 nano-calcium carbon